Expansible binding for books



(NoMod'eL) A 8 Sheets'Sh et 1.- .0. T. ROSENTHAL. EXPANSIBLE BINDING FOR BOOKS. No. 583,335. Patented May 25,1897.

IIVI ENTOR ATTORNEYS.

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EXPANSIBLE BINDING FOR BOOKS. I N0, 583,335. Patented May 25, 1897 UNITED STATES PATENT O FI E.

CHARLES T. ROSENTI-IAL, OF BATESVILLE, ARKANSAS.

EXPANSIBLE BINDING FOR BOOKS..

SPEcfFIcATIoN forming part of Letters Patent No. 583,335, dated May 25, 1897.

Application an October 12,1896. Serial No. 608,592 (Nomodeh) for Books, of which the following is a full,

clear, and exact description.

My invention relates to'improvements in expansible bindings adapted to be used in connection with account-books or with periodicals or anyothersuch books which require to be bound together. i

It consists of certain devices by which the number of leaves or the contents of the book may be increased or diminished at will.

The particular construction of the device will be seen from'the specification following.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a perspective view of the book closed. Fig. 2 is a perspective view of the book, the same being open, with the leaves all thrown in one direction. Fig. 3 is a plan view of one of the leaves extracted. Fig. 4 is a perspective of the book opened and with the plates covering the tightening mechanism raised so as to exhibit the same. Fig. 5 is an end elevation showing the position when the binding is to be opened for the insertion or removal of one or more sheets. Fig. 6 is a perspective view of one-half of the spreader used for this purpose. Fig. 7 is an end sectional elevation showing the back of the book and a portion of the locking mechanism. Fig. 8 is a similar view taken at another point.

Fig. 9 is a plan view showing the back portion of the book and one of the binding-strips, and Figs. 10 and 11 are perspective views of outer and inner bars used for holding the sheets in place.

The object of my lnventlon 1s to provide a binding which may be used more particularly with account-books and by means of which description being confined toits use in connection with blank books.

The back of the book A is formed of twothin metal plates A and A Each of these plates at a is bent at right angles to the back portion and is adapted to press against the back edge of the sheets forming the book. One of these plates A has each end bent over, "as shown at A in Fig. 9. This forms ar ecess which receives the other plate A, thus forming a guide in which the plate A can slide and thereby increase or diminish the thickness of the book.

The covers B and B are pivoted to the plates A and A by the pin B, which passes through eyes formed in the back plates and in clamps attached to the cover of the book. The pin B upon one side has binding-strips E attached thereto, which strips are formed of some flexible material, as leather, and extend across the back of the'book and, by means hereinafter described, hold the sheets in place. The means for tightening the book are attached to the opposite ends of the strips.

The bars shown in Figs. 0, 10, and 11 consist of thin strips of metal having a series of.

round holes D punched therein at regular intervals. A portion of these holes have a series of pins D fixed therein and projecting from the side of the bar. As shown in Figs. 7 and 8, several of these bars are used. They are to be placed at such a distance apart that the pins of one bar will enter the holes in the other bar when the leaves of the bookare compressed, and for this purpose the pins in one bar are placed opposite the holes in the adjacent bar. The central bars are provided with pins extendingin both directions, while the outer bars are provided with pins extending only toward the center. These bars also have slots 1) extendingthrough them, which slots are all similarly placed on each bar, and the binding-strips E pass through these slots and serve to'hold them all together.

The sheets of paper S, one of which is shown in Fig. 3, have their backs notched with rectangular notches G, adapted to pass over the binding-strips-E. They also have perforations g, which correspond in location with the perforations in the bars D. As a consequence when the; sheets are placed over the bination of a series of thin bars having perforations therein at intervals, pins fixed in a portion of these perforations and projecting from the side of thebars, the pins of one bar registering with the holesof the adjacent bar or bars, and a binding or tension strip passing through holes in all the bars,with a series of leaves having notches in their back edges adapted to pass over the biinling-strips, and also having perforations registering with the perforations of the above-named thin bars, substantially as described.

4. A back for an expansible book consisting of a plate bent at one edge to embrace one side of the book, and having guides at the ends formed by bcndingthe metal back-upon itself, and a second plate slidingin said guides and bent on one edge to embrace the other side of the book, substantially as described.

5. In an expansible book, a back consisting of. a plate bent at one edge to embrace the side of the book, and having guides upon the back portion, a second plate sliding on said guides and bent on one edge to embrace the other side of the book, in combination with strips extending across the shallow trough formed by the two back plates, and means for tightening and relaxing the same, bars movably fixed on said strips and provided with pins and perforations adapted to mutually engage each other, and leaves having perforations adapted to receive the, pins on said bars, substantially as described;-

6, A book provided with an expansiblc back, binding-strips extending across the same, bars strung thereon and provided with projecting pins and'perforations i'cciprocally' registering with each other, and leaves notched and perforated to engage the bind-- ing strips and pins, in combination with a spreader consisting of two plates sharpened at one edge, and provided with notches on this edge registering with said binding pins and strips, and provided with projecting f ulcrnms upon one side, substantially as described. I

7. An expapsible binding for books, comprising a back made in two parts slidingone upon the other, means attached thereto adapted to secure or release the leaves by such movement, binding-strips attached to one of the sliding back members, a bar attached to the other ends of said bind i ng-strips,a notched bar attached thereto at right angles, guides upon the book-cover for the same, a lever pivoted to the book-cover and having a notched segment engaging the notched bar, and means for lockingsaid lever in anyposition, substantially as described.

8. An expansible binding for books, comprising a back made in two parts sliding one open the other, means attached thereto adapted to secure or release the leaves by such movement, binding-strips attached to one of the sliding back members, a bar attached to the other ends of said binding strips, a notched bar attached thereto at right angles, guides upon the book-cover for the same, a lever pivoted to the book-cover and having a notched segment engaging the notched bar, and means for locking said lever in any position, said operating mechanism occupying a recess on the inner surface of one cover, and a plate hinged thereto and covering said recess, substantially as described.

9. An expansible binding for books, comprising aback made in two parts sliding one upon the other, means attached thereto adapt- .ed to secure or release the leaves by such movement, binding-strips attached to one of the sliding back members, a bar attached to the other ends of said binding-strips, a spring attached at its ends to said bar, a notched bar attached to the spring at right angles, guides upon the book-cover for the same, a lever pivoted to the book-cover and having a notchedsegment engaging the notched bar, and means for locking said lever in any position, substantially as described.

10. In an expansible binding, a series of thin bars or springs having perforations therein and side projecting pins, the pins of one bar registering with holes in the other bars, binding-bands passing through holes in all the bars and attached at one end to one edge of the book-back, a common attachment at the other ends of the bands, a tightening device attached to the other side of the book, and a spring connection between said tight ening device and the binding-bands, substantially as described.

11. An expansible binding for books con-.

sisting of strips having side projecting spurs and perforations located so that the spurs of one strip will register with holes in the other,

and having common registering holes'for receiving bindingstrips, and strips passing through said holes and adapted to clamp the whole together, substantially as described.

12. An cxpansible binding for books consisting of an expansible back, strips extending lengthwise the back but disconnected therefrom, consisting of thin bars having side projecting spurs and perforations located so that the spurs of onestrip register with holes in the other strips, binding-bands attached to opposite sides of the expansiblc back and passing through said strips, and means by (No Model) v P. RUDOLPH. OBJECT GLASS.

No. 583,336. Patented May 25,.1897.

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